CN102246447A - Wireless communication terminal apparatus, wireless communication base station apparatus and signal spreading method - Google Patents

Abstract

A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit (214) primarily spreads a response signal by use of a ZAC sequence established by a control unit (209). A spreading unit (217) secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit (209). The control unit (209) controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit (214) and the block-wise spread code sequence to be used for the secondary spread in the spreading unit (217). The hopping pattern established in the control unit (209) is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.

Description

Radio communication terminal device, radio communication base station device and signal spread-spectrum method

Technical field

The present invention relates to radio communication terminal device, radio communication base station device and response signal diffusion method.

Background technology

In 3GPP LTE, adopt the communication mode (with reference to non-patent literature 1) of SC-FDMA (Single-Carrier Frequency Division Multiple Access, single-carrier frequency division multiple access) as uplink.In 3GPP LTE, radio communication base station device (being designated hereinafter simply as " base station ") is for radio communication terminal device (being designated hereinafter simply as " terminal "), by physical channel (for example, PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel)) distributes uplink data resource.

In addition, in 3GPP LTE,, be suitable for HARQ (Hybrid Automatic Repeat reQuest, mixed automatic retransmission request) for the downlink data that mails to terminal from the base station.That is to say that terminal will represent that the response signal of the error detection result of downlink data feeds back to the base station.Terminal is carried out CRC (Cyclic Redundancy Check to downlink data, cyclic redundancy check (CRC)), if CRC=" OK (zero defect) " is then with ACK (Acknowledgment, positive acknowledgement) signal feedback is given the base station in response, if CRC=" NG (mistake is arranged) " then with NACK (Negative Acknowledgment, Negative Acknowledgement) in response signal feedback give the base station.Terminal for example uses PUCCH uplink control channels such as (Physical Uplink Control Channel, Physical Uplink Control Channel) to send to the base station this response signal (being ack/nack signal).

Fig. 1 is the figure of the resource distribution of the PUCCH among the expression 3GPP LTE.PUSCH shown in Figure 1 (Physical Uplink Shared Channel, Physical Uplink Shared Channel) is the channel that is used for the uplink data transmission of terminal, uses when terminal sends the uplink data.As shown in Figure 1, PUCCH is configured in the both ends of band system band, particularly, is configured in the Resource Block (RB:Resource Block, or PRB:Physical RB, Physical Resource Block) at the two ends of band system band.The PUCCH that is configured in the both ends of band system band replaces between time slot, and promptly each time slot carries out frequency hopping.

In addition, as shown in Figure 2, studying a plurality of response signals use ZAC (Zero Auto Correlation, zero auto-correlation) sequence and Walsh (Walsh) sequence from a plurality of terminals are being carried out spread spectrum, thereby carrying out sign indicating number multiplexing (with reference to non-patent literature 2).In Fig. 2, [W ₀, W ₁, W ₂, W ₃] represent that sequence length is 4 walsh sequence.As shown in Figure 2, in terminal, the response signal of ACK or NACK is that the sequence of ZAC sequence (sequence length is 12) is carried out spread spectrum one time by the characteristic on time shaft at first on frequency axis.Then, response signal and the W behind spread spectrum ₀～W ₃Carry out IFFT (Inverse Fast Fourier Transform, invert fast fourier transformation) respectively accordingly.At spread spectrum on the frequency axis response signal to utilize this IFFT to be converted to sequence length on the time shaft be 12 ZAC sequence.And signal behind the IFFT and then use walsh sequence (sequence length is 4) carry out the secondary spread spectrum.That is to say that a response signal is configured in 4 SC-FDMA code element S respectively ₀～S ₃In.In other-end, use ZAC sequence and walsh sequence similarly, response signal is carried out spread spectrum.But, between different terminals, use cyclic shift (Cyclic Shift) mutually different ZAC sequence of amount or mutually different walsh sequence on time shaft.Therefore here, the sequence length of ZAC sequence on time shaft is 12, and can use the cyclic shift amount that generates from same ZAC sequence is 12 ZAC sequences of 0～11.In addition, the sequence length of walsh sequence is 4, therefore can use mutually different 4 walsh sequences.Thus, in desirable communication environment, can be multiplexing to carry out sign indicating number from the response signal of the individual terminal in maximum 48 (12 * 4).

In addition, as shown in Figure 2, studying carry out sign indicating number multiplexing (with reference to non-patent literature 2) from a plurality of reference signals (pilot signal) of a plurality of terminals.As shown in Figure 2, at the reference signal R that generates 3 code elements from ZAC sequence (sequence length is 12) ₀, R ₁, R ₂Situation under, at first making sequence lengths such as ZAC sequence and Fourier series is 3 orthogonal sequence [F ₀, F ₁, F ₂] carry out IFFT respectively accordingly.Utilizing this IFFT to obtain sequence length on time shaft is 12 ZAC sequence.And, use orthogonal sequence [F ₀, F ₁, F ₂], the signal behind the IFFT is carried out spread spectrum.That is to say that a reference signal (ZAC sequence) is configured in 3 SC-FDMA code element R respectively ₀, R ₁, R ₂In.Similarly a reference signal (ZAC sequence) is configured in 3 SC-FDMA code element R respectively in the other-end ₀, R ₁, R ₂In.But, between different terminals, use mutually different ZAC sequence of cyclic shift amount or mutually different orthogonal sequence on time shaft.Therefore here, the sequence length of ZAC sequence on time shaft is 12, and can use the cyclic shift amount that generates from same ZAC sequence is 12 ZAC sequences of 0～11.In addition, the sequence length of orthogonal sequence is 3, therefore can use mutually different 3 orthogonal sequences.Thus, in desirable communication environment, can be multiplexing to carry out sign indicating number from the reference signal of the individual terminal in maximum 36 (12 * 3).

And, as shown in Figure 2, utilize S ₀, S ₁, R ₀, R ₁, R ₂, S ₂, S ₃7 code elements constitute a time slot.

Here, the cross-correlation between the mutually different ZAC sequence of cyclic shift amount that generates from same ZAC sequence is roughly 0.Thus, in desirable communication environment, use the mutually different ZAC sequence of cyclic shift amount (the cyclic shift amount is 0～11) spread spectrum and carry out the multiplexing a plurality of response signals of sign indicating number respectively, can on time shaft, exist intersymbol interference ground to separate hardly by the relevant treatment in the base station.

But, because the influence of the transmission timing offset in the terminal, the delay ripple that produces by multipath etc., not necessarily arrive the base station simultaneously from a plurality of response signals of a plurality of terminals.For example, regularly be later than under the correct transmission situation regularly in the transmission of using the response signal after the cyclic shift amount is 0 ZAC sequence spread spectrum, the cyclic shift amount is that the correlation peak of 0 ZAC sequence appears in the detection window that the cyclic shift amount is 1 ZAC sequence sometimes.In addition, exist under the situation that postpones ripple in the response signal of using after the cyclic shift amount is 0 ZAC sequence spread spectrum, the interference leakage that this delays ripple produces appears in the detection window that the cyclic shift amount is 1 ZAC sequence sometimes.That is to say that in these cases, the cyclic shift amount is that 1 ZAC sequence is subjected to from the cyclic shift amount is the interference of 0 ZAC sequence.On the other hand, the transmission of using the response signal after the cyclic shift amount is 1 ZAC sequence spread spectrum regularly early than correct transmission situation regularly under, the cyclic shift amount is that the correlation peak of 1 ZAC sequence appears in the detection window that the cyclic shift amount is 0 ZAC sequence sometimes.That is to say that in the case, the cyclic shift amount is that 0 ZAC sequence is subjected to from the cyclic shift amount is the interference of 1 ZAC sequence.Thus, in these cases, using the cyclic shift amount is that response signal behind 0 the ZAC sequence spread spectrum is the stalling characteristic deterioration of the response signal behind 1 the ZAC sequence spread spectrum with using the cyclic shift amount.That is to say that if use the ZAC sequence of the cyclic shift amount that adjoins each other, then the stalling characteristic of response signal might deterioration.

So,, the spread spectrum of a plurality of response signals by the ZAC sequence carried out under the multiplexing situation of sign indicating number, in the cyclic shift interval that the degree that the intersymbol interference between the ZAC sequence does not take place is set between the ZAC sequence (cyclic shift amount poor) in the past.For example, the cyclic shift interval between the ZAC sequence is made as 2, is 12 at sequence length, the cyclic shift amount is in 12 ZAC sequences of 0～11, to be 0,2 with the cyclic shift amount only, 4,6,8,10 or the cyclic shift amount be 1,3,6 ZAC sequences of 5,7,9,11 are used for a spread spectrum of response signal.Thus, be used at the walsh sequence that with sequence length is 4 under the situation of secondary spread spectrum of response signal, can be multiplexing to carry out sign indicating number from the response signal of the individual terminal in maximum 24 (6 * 4).

But as shown in Figure 2, the sequence length of orthogonal sequence that is used for the spread spectrum of reference signal is 3, therefore can only use mutually different 3 orthogonal sequences in the spread spectrum of reference signal.Thus, using reference signal shown in Figure 2 to separate under the situation of a plurality of response signals, can only be multiplexing to carry out sign indicating number from the response signal of the individual terminal in maximum 18 (6 * 3).Thus, in sequence length is 4 walsh sequences of 4, have 3 walsh sequences just much of that, therefore some walsh sequences are not used.

In addition, studying, defining 18 PUCCH shown in Figure 3 (ACK#1 shown in Figure 3～ACK#18) as being used for the PUCCH of the transmission of above-mentioned 18 response signals.In Fig. 3, transverse axis is represented the cyclic shift amount, and the longitudinal axis is represented the sequence number (sequence number of walsh sequence or Fourier series) of orthogonal coding sequence.

In addition, in order to reduce the interference among the PUCCH, studying the technology (with reference to non-patent literature 3) of cyclic shift frequency hopping (Cyclic shift Hopping) from other sub-districts.So-called cyclic shift frequency hopping, be for 18 resources shown in Figure 3 (ACK#1～ACK#18), use the distinctive cyclic shift frequency hopping pattern in sub-district shown in Figure 4 (pattern), on the cyclic shift axle and on the orthogonal coding axle, keep in the mutual dependency relation, with the SC-FDMA code element be unit (be code element 0,1 in Fig. 4,2, ..., the technology that n) is shifted circularly.As shown in Figure 4, though the employed cyclic shift amount of the resource that certain response signal is assigned with changes each SC-FDMA code element, but in the sub-district, keep the relativeness of the resource (cyclic shift amount and orthogonal coding) of same time, same frequency, so these 18 resource quadratures.Thus, can make the combining randomization that is subjected to more strongly disturbing response signal from other sub-districts, can avoid only a part of terminal continue to be subjected to from other sub-districts than strong jamming.In addition, generally speaking, different districts is distributed mutually different ZAC sequence, so the difference of the ZAC sequence of minizone also helps the randomization of interference.

In addition, in the PUCCH of 3GPP LTE, not only above-mentioned response signal (ack/nack signal), and also CQI (Channel Quality Indicator, CQI) signal also carries out multiplexing.Response signal is the information of 1 code element as mentioned above, and the CQI signal is the information of 5 code elements.As shown in Figure 5, terminal is 12 ZAC sequence spread spectrum CQI signal by sequence length, and the CQI signal behind the spread spectrum is carried out IFFT and with its transmission.Like this, to the inapplicable walsh sequence of CQI signal, therefore can not be in the base station at use walsh sequence in the separating of response signal and CQI signal.So, in the base station,, use the ZAC sequence to carry out despreading to by corresponding to response signal behind the ZAC sequence spread spectrum of different cyclic shifts and CQI signal, do not separate response signal and CQI signal thereby can almost there be intersymbol interference ground.

In addition, even the CQI signal is also same with response signal, in order to make the presence of intercell interference randomization, is studying and using the distinctive cyclic shift frequency hopping pattern in sub-district, is that unit carries out the cyclic shift frequency hopping with the SC-FDMA code element.As shown in Figure 6, though the cyclic shift amount that the resource that certain CQI signal is assigned with is used changes to each SC-FDMA code element, keep the relativeness of the cyclic shift amount of same time, same frequency.In addition, same with response signal, for the CQI signal, also in different districts, distribute mutually different ZAC sequence, so the difference of the ZAC sequence of minizone also helps the randomization disturbed.

In addition, in 3GPP LTE, Fig. 4 or cyclic shift frequency hopping pattern shown in Figure 6 are related one to one corresponding with the sub-district ID of each base station.

In addition, begun to compare the standardization of the senior LTE (LTE-Advanced (hereinafter referred to as LTE+)) that realizes further communication high speed with 3GPP LTE.In LTE+, for the raising of average throughput and the raising that is positioned near the throughput of the terminal the cell edge, studying a plurality of base station cooperation receiving and transmitting signals and presence of intercell interference is being coordinated the coordination transmitting-receiving (Coordinated Multipoint Transmission/Reception (coordinating multicast communication/receptions): CoMP receives and dispatches) of (coordinate).

The prior art document

Non-patent literature

Non-patent literature 1:3GPP TS 36.211V8.4.0, " Physical Channels and Modulation (Release 8), " Sep.2008

Non-patent literature 2:Multiplexing capability of CQIs and ACK/NACKs form different UEs (ftp: //ftp.3gpp.org/TSG_RAN/WG1_RL1/TSGR1_49/Docs/R1-072315.zip)

Non-patent literature 3:Randomization of intra-cell interference in PUCCH (ftp: //ftp.3gpp.org/TSG_RAN/WG1_RL1/TSGR1_50/Docs/R1-073412.zip)

Summary of the invention

The problem that invention will solve

For example, Fig. 7 represents that a plurality of base stations receive the situation of the up response signal (being that CoMP receives) from a terminal.Among Fig. 7, the base station (Serving eNB, service eNB) under certain terminal (UE1) sends downlink data to UE1.In addition, UE1 sends the response signal (expectation ACK/NACK shown in Figure 7) to downlink data.And as shown in Figure 7, three base stations of service eNB and other base stations (Neighbour eNB1 and Neighbour eNB2, adjacent eNB 1 and adjacent eNB 2) receive carry out CoMP from the response signal of UE1.Here, will be called the CoMP group to the group of carrying out a plurality of base stations that CoMP receives of the response signal of coming self terminal.In addition, three base stations shown in Figure 7 analog information (soft bit information: soft bit information) of transmitting by backhaul that (backhaul) exchange receives separately from the response signal of UE1.And for example, service eNB utilizes high specific synthetic (MRC:Maximum Ratio Combining) to synthesize the analog information of the response signal that three base stations receive, and response signal is decoded.In addition, service eNB is carried out repeating transmission control to the downlink data of UE1 based on decoded response signal.

In addition, Fig. 8 represents that a plurality of base stations send (being that CoMP sends) downlink data (reference signal) to a terminal, terminal sends the CQI signal that has been generated by the reference signal that sends from a plurality of base station CoMP, and a plurality of base stations carry out the situation that CoMP receives to the CQI signal that comes self terminal.In addition, in Fig. 8, three base stations (service eNB, adjacent eNB 1 and adjacent eNB 2) of participating in same CoMP group are to belonging to the UE1 of service eNB, and CoMP sends same downlink data (reference signal).UE1 uses the reference signal that receives, and estimates the downgoing line quality between this terminal and each base station, and will represent that the CQI information of each downgoing line quality sends to each base station.Wherein, will to gather the CQI information of three base stations be that a CQI signal (expectation CQI shown in Figure 8) sends to UE1.And three base stations shown in Figure 8 are carried out CoMP to the CQI signal from UE1 and are received.Here, same with Fig. 7, the analog information (soft bit information) that exchanges the CQI signal that receives is separately transmitted in three base stations by backhaul.And for example, service eNB utilizes high specific to synthesize the analog information of the CQI signal that three base stations receive, and the CQI signal is decoded.In addition, service eNB is based on the CQI signal of having decoded, i.e. downgoing line quality between UE1 and each base station, MCS of the downlink data that control sends from each base station (Modulation and Coding Scheme, modulation and coded system) or spatial reuse etc.

Here, in Fig. 7 and Fig. 8,, also receive carry out CoMP from the control signal (response signal or CQI signal) that with adjacent eNB 2 is the UE2 of service eNB to carry out three base stations that CoMP receives from the control signal (response signal or CQI signal) of UE1.That is to say, in Fig. 7 and Fig. 8, participate in three base stations of same CoMP group, receive carry out CoMP from the control signal of two terminals.

But as mentioned above, for the inter-signal interference randomization between the control signal (response signal or CQI signal) that makes the terminal transmission that belongs to each sub-district, the distinctive frequency hopping pattern of mutually different ZAC sequence and sub-district is used in each sub-district.For example, in Fig. 7 and Fig. 8, the UE2 that belongs to the UE1 of service eNB and belong to adjacent eNB 2 uses mutually different ZAC sequence and mutually different frequency hopping pattern.Therefore, mutual generation is disturbed from the control signal (response signal and CQI signal) of UE1 and from the control signal (response signal and CQI signal) of UE2 is not mutually orthogonal.

Thus, for example, to using distinctive ZAC sequence of service eNB and frequency hopping pattern to send, to using adjacent eNB 2 distinctive ZAC sequences and frequency hopping pattern to send from the response signal of UE2 from the response signal of UE1 shown in Figure 7.Thus, in adjacent eNB 2, mutual generation is disturbed from the response signal of UE1 and from the response signal of UE2 is not mutually orthogonal.That is to say, produce from the response signal of UE1 and response signal mutual interference mutually, the problem of the quality deterioration of CoMP from UE2.

Even use same CoMP group in a plurality of terminals, under the mutually different situation of the service eNB of each terminal,, also can address the above problem by separating time/frequency resource of using as control channel (for example PUCCH).But in this case, the expense that is used for the uplink control channel of CoMP communication increases.

The objective of the invention is to, terminal, base station and the signal spread-spectrum method that can carry out CoMP communication in the expense that does not increase the uplink control channel efficiently are provided.

The scheme of dealing with problems

The structure that terminal of the present invention adopted comprises: first spectrum-spreading unit, and any sequence in a plurality of first sequences that use can be separated from each other is carried out spread spectrum one time to signal; And control unit, according to frequency hopping pattern by a plurality of channels of described a plurality of first sequence definitions, first sequence that control is used by described first spectrum-spreading unit, described frequency hopping pattern are to coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

The structure that adopt base station of the present invention comprises: the relevant treatment unit, use is by the frequency hopping pattern of a plurality of channels of a plurality of first sequence definitions that can be separated from each other, and asks from the correlation between described first sequence that has been used for a spread spectrum in the signal of radio communication terminal device and the described radio communication terminal device; And synthesis unit, the correlation of the synthetic described signal that receives with described correlation with by other radio communication base station devices that described signal is coordinated to receive synthesizes, and described frequency hopping pattern is to coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

Signal spread-spectrum method of the present invention comprises: the first spread spectrum step, and any sequence in a plurality of first sequences that use can be separated from each other is carried out spread spectrum one time to signal; And controlled step, according to frequency hopping pattern by a plurality of channels of described a plurality of first sequence definitions, first sequence that control is used by described first spectrum-spreading unit, described frequency hopping pattern are to coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

The effect of invention

According to the present invention, can carry out CoMP communication on the expense ground that does not increase the uplink control channel.

Description of drawings

Fig. 1 is the figure (in the past) of the resource distribution of expression PUCCH.

Fig. 2 is the figure (in the past) of the spectrum spreading method of expression response signal and reference signal.

Fig. 3 is the figure (in the past) of the definition of expression response signal.

Fig. 4 is the figure (in the past) of the frequency hopping pattern of expression response signal.

Fig. 5 is the figure (in the past) of the spectrum spreading method of expression CQI signal and reference signal.

Fig. 6 is the figure (in the past) of the frequency hopping pattern of expression CQI signal.

Fig. 7 is the figure (in the past) that the CoMP of expression response signal receives.

Fig. 8 is the figure (in the past) that the CoMP of expression reference signal sends and the CoMP of CQI signal receives.

Fig. 9 is the block diagram of structure of the base station of expression embodiment of the present invention 1.

Figure 10 is the block diagram of structure of the terminal of expression embodiment of the present invention 1.

Figure 11 A is the figure of the CoMP group of expression embodiment of the present invention 1.

Figure 11 B is the figure of the response signal of expression embodiment of the present invention 1 with resource.

Figure 12 is the block diagram of structure of the base station of expression embodiment of the present invention 2.

Figure 13 is the block diagram of structure of the terminal of expression embodiment of the present invention 2.

Figure 14 A is the figure of the CoMP group of expression embodiment of the present invention 2.

Figure 14 B is the figure of the CQI signal of expression embodiment of the present invention 2 with resource.

Embodiment

Below, explain embodiments of the present invention with reference to accompanying drawing.

(execution mode 1)

The structure of the base station 100 of present embodiment shown in Figure 9, the structure of the terminal 200 of present embodiment shown in Figure 10.

In addition, become complicated for fear of explanation, in Fig. 9, illustrate with the transmission of the closely-related downlink data of the present invention and to the relevant structure member of the reception of passing through uplink of the response signal of this downlink data, the diagram and the explanation of omitting the structure member relevant with the reception of uplink data.Equally, in Figure 10, illustrate with the reception of the closely-related downlink data of the present invention and to the relevant construction unit of the transmission of passing through uplink of the response signal of this downlink data, omit the diagram and the explanation of the relevant structure member of the transmission of uplink data.

In addition, in the following description, illustrate in a spread spectrum and use the ZAC sequence, in the secondary spread spectrum, use the situation of block unit spread spectrum code sequence.But, in spread spectrum, also can use sequence beyond the ZAC sequence, that utilize mutually different cyclic shift amount to be separated from each other.For example, in a spread spectrum, also can use GCL (Generalized Chirp like) sequence, CAZAC (Constant Amplitude Zero Auto Correlation, constant amplitude zero auto-correlation) PN sequences such as sequence, ZC (Zadoff-Chu) sequence, M sequence or quadrature Gold coded sequence, the perhaps precipitous sequence of the self-correlation properties that generate by computer random ground etc.In addition, in the secondary spread spectrum,, promptly can use any sequence as the block unit spread spectrum code sequence so long as mutually orthogonal sequence perhaps can be considered as mutually the roughly sequence of quadrature.For example, in the secondary spread spectrum, can use walsh sequence or Fourier series etc. as the block unit spread spectrum code sequence.

In addition, in the following description, according to the resource (for example, PUCCH or PRB) of the sequence number definition response signal of the cyclic shift amount of ZAC sequence and block unit spread spectrum code sequence.

In addition, in the following description, the ID (hereinafter referred to as specific ID (Special ID)) that each CoMP group has been set is with the time/frequency resource (for example PRB) of the response signal transmission usefulness of uplink related corresponding.Specific ID is adjusted between a plurality of base stations of participating in same CoMP group in advance.In addition, whether each base station is carried out CoMP to the response signal of coming self terminal to each terminal notice and is received when communicating with each terminal.In addition, each base station is to sending the terminal of the response signal that is received by CoMP, and notice is organized corresponding specific ID with the CoMP that our station is participated in.In addition, the sub-district ID of our station is notified in each base station to the terminal that belongs to our station.In addition, make the bit number of specific ID identical with the bit number of sub-district ID.

Whether base station 100 shown in Figure 9 is prenoticed response signal that each terminal of expression sends for each terminal and is carried out the information of the sub-district ID of information that CoMP receives, expression our station, represents that the information of the resource (for example PRB) that response signal that each terminal sends is assigned with and expression and the CoMP that our station is participated in organize the information (not shown) of corresponding specific ID by comprising a plurality of base stations in originally standing in.

In addition, in base station shown in Figure 9 100, the resource allocation result of downlink data is imported into control information generation unit 101 and map unit 104.In addition, be used to notify the encoding rate of each terminal of control information of the resource allocation result of downlink data, be imported into control information generation unit 101 and coding unit 102 as encoding rate information.

Control information generation unit 101 generates the control information of the resource allocation result that is used to notify downlink data to each terminal, and outputs to coding unit 102.In the control information of each terminal, comprising expression is the Termination ID information that mails to the control information of which terminal.For example, the CRC bit that has shielded with ID number of the terminal of the notify object of control information is included in the control information as Termination ID information.

Coding unit 102 is encoded and is outputed to modulating unit 103 control information of each terminal according to the encoding rate information of input.

Map unit 104 is modulated and is outputed in control information behind 103 pairs of codings of modulating unit.

On the other hand, 105 pairs of the coding units transmission data (downlink data) that mail to each terminal are encoded and are outputed to and retransmit control unit 106.

Retransmit the transmission data control unit 106 keeps coding to each terminal when first the transmission after, and output to modulating unit 107.Retransmit control unit 106 and keep sending data, up to till identifying unit 118 ACKs of input from each terminal.In addition, retransmit control unit 106 under situation about having imported from identifying unit 118 from the NACK of each terminal, promptly when retransmitting, transmission data that will be corresponding with this NACK output to modulating unit 107.

Map unit 104 is modulated and outputed to 107 pairs of the modulating units transmission data behind the coding of retransmitting control unit 106 inputs.

When the transmission of control information, map unit 104 will be mapped to physical resource (time/frequency resource) and output to IFFT unit 108 from the control information of modulating unit 103 inputs according to the resource allocation result from 101 inputs of control information generation unit.

On the other hand, when the transmission of downlink data, map unit 104 is according to resource allocation result, with the transmission data map that mails to each terminal to physical resource and output to IFFT unit 108.That is to say that map unit 104 is according to resource allocation result, with the transmission data map of each terminal any subcarrier in a plurality of subcarriers that constitute the OFDM code element.

Thereby IFFT unit 108 carries out IFFT for a plurality of subcarriers that shone upon control information or transmission data generates the OFDM code element, and outputs to CP (Cyclic Prefix, Cyclic Prefix) extra cell 109.

CP extra cell 109 will divide identical signal to append to the beginning of OFDM code element as CP with the tail portion of OFDM code element.

OFDM code element behind the 110 couples of additional CP in wireless transmission unit is carried out D/A conversion, amplification and up-conversion etc. and is sent processing, and sends to terminal 200 (Figure 10) from antenna 111.

On the other hand, radio receiving unit 112 receives response signal or the reference signal that sends from terminal 200 by antenna 111, and response signal or reference signal are carried out reception processing such as down-conversion, A/D conversion.

CP removes that unit 113 will be attached to response signal after receive handling or the CP in the reference signal removes.

Despread unit 114 is carried out despreading to be used for the block unit spread spectrum code sequence of secondary spread spectrum in terminal 200 to response signal, and the response signal after the despreading is outputed to relevant treatment unit 116.Equally, despread unit 114 is carried out despreading with the orthogonal sequence of the spread spectrum that is used for reference signal in terminal 200 to reference signal, and the reference signal after the despreading is outputed to relevant treatment unit 116.

Generation unit 115 judges that the response signal that sends from terminal 200 is to carry out the response signal that CoMP receives by a plurality of base stations that comprise in originally standing in, and still the response signal that is only received by our station based on result of determination, generates ZAC sequence and frequency hopping pattern.For example, under the situation of carrying out the response signal that CoMP receives, generation unit 115 generates with the CoMP that our station is participated in and organizes corresponding ZAC sequence and the frequency hopping pattern of having set of specific ID.Here, corresponding one to one to the specific ID of CoMP group setting with frequency hopping pattern.That is to say, carry out the employed frequency hopping pattern of response signal that CoMP receives and be CoMP and receive public frequency hopping pattern in a plurality of base stations of response signal, that is, participate in public frequency hopping pattern in a plurality of base stations (sub-district) of same CoMP group.On the other hand, generation unit 115 is under the situation of the response signal that only received by our station at it, generates ZAC sequence and the frequency hopping pattern corresponding with the sub-district ID of our station.And ZAC sequence and frequency hopping pattern that generation unit 115 will generate output to relevant treatment unit 116.

Relevant treatment unit 116 uses from the ZAC sequence and the frequency hopping pattern of generation unit 115 inputs, finds the solution the correlation between the ZAC sequence that has been used for a spread spectrum in response signal after the expansion and reference signal after the despreading and the terminal 200.And relevant treatment unit 116 outputs to identifying unit 118 and CoMP control unit 117 with the correlation of trying to achieve.Here, the cyclic shift amount that is used for the cyclic shift frequency hopping in each terminal is unit and difference with SC-FDMA.Therefore, relevant treatment unit 116 to the different correlation window of each SC-FDMA code element, extracts response signal and reference signal from each terminal according to the frequency hopping pattern from generation unit 115 inputs.

CoMP control unit 117 is under the situation that our station moves as service eNB for the terminal that has sent response signal (terminal that has promptly sent response signal belongs under the situation of our station), will by backhaul transmit transmission, output to identifying unit 118 from participating in the information of other base stations of the same CoMP group of our station (that is the correlation of the response signal obtained of other base stations).On the other hand, be not (terminal that has promptly sent response signal belongs under the situation of other sub-districts) under the situation of service eNB for the terminal that has sent response signal at our station, the correlations (correlation of the response signal that our station is obtained) that CoMP control unit 117 will 116 inputs from the relevant treatment unit be sent to by backhaul participates in other base stations of organizing with the same CoMP of our station.

Identifying unit 118 will be from the relevant treatment unit 116 inputs correlations with for example synthesize from the correlation of CoMP control unit 117 inputs (correlation of the response signal that receives by other base stations of participating in the same CoMP group of our station) by MRC etc.And identifying unit 118 is based on this synthetic result, the synchronous detection of the correlation by having used reference signal, and the response signal of judging each terminal is ACK or NACK.And identifying unit 118 outputs to repeating transmission control unit 106 with the ACK or the NACK of each terminal.

On the other hand, in terminal shown in Figure 10 200, radio receiving unit 202 receives the 100 OFDM code elements that send from the base station by antenna 201, the OFDM code element is carried out down-conversion, A/D conversion etc. receive processing.

CP removes unit 203 and removes the CP that is attached in the OFDM code element that receives after handling.

FFT (Fast Fourier Transform, fast fourier transform) carries out FFT for the OFDM code element in unit 204, obtains to be mapped to control information or downlink data in a plurality of subcarriers, and they are outputed to extraction unit 205.

The encoding rate information of the encoding rate of expression control information is imported into extraction unit 205 and decoding unit 207.

Extraction unit 205 according to the encoding rate information of input, extracts control information and outputs to demodulating unit 206 when carrying out the reception of control information from a plurality of subcarriers.

Demodulating unit 206 demodulation control informations, and output to decoding unit 207.

Coding unit 207 is decoded and is outputed to identifying unit 208 control information according to the encoding rate information of input.

On the other hand, when carrying out the reception of downlink data, extraction unit 205 extracts from a plurality of subcarriers and mails to the downlink data of this terminal and output to demodulating unit 210 according to the resource allocation result from identifying unit 208 inputs.This downlink data carries out demodulation by demodulating unit 210, is decoded by decoding unit 211, and is input to CRC unit 212.

CRC unit 212 has used the error detection occurs of CRC for decoded downlink data, under the situation of CRC=" OK (zero defect) ", generate ACK signal in response, under the situation of CRC=" NG (mistake is arranged) ", generate NACK signal in response, the response signal that has generated is outputed to modulating unit 213.In addition, CRC unit 212 is under the situation of CRC=" OK (zero defect) ", and the downlink data behind the output decoder is as receiving data.

Whether 208 pairs of control informations from decoding unit 207 inputs of identifying unit are that blind judgement is carried out in the control information of mailing to this terminal.For example, identifying unit 208 demasks to the CRC bit with ID number of this terminal, thereby the control information of CRC=" OK (zero defect) " is judged to be the control information of mailing to this terminal.And identifying unit 208 will mail to the control information of this terminal, and promptly the resource allocation result to the downlink data of this terminal outputs to extraction unit 205.

In addition, identifying unit 208 from the subcarrier corresponding physical resource (time/frequency resource) of having shone upon the control information of mailing to this terminal, judgement is used for from the resource (for example PUCCH) of the transmission of the response signal of this terminal, and result of determination is outputed to control unit 209.

Whether the response signal that control unit 209 keeps is that has prenoticed base station 100 under this terminal, expression sends from this terminal is carried out information that CoMP receives, is represented that the information of the resource (for example PRB (Physical Resource Block, Physical Resource Block)) that the information of the sub-district ID of the base station under this terminal, response signal that expression sends from this terminal are assigned with and expression and the CoMP under the situation about being received by CoMP in the response signal from this terminal organize the information of corresponding specific ID by a plurality of base stations.

Control unit 209 is under the situation that the response signal that sends from this terminal is received by CoMP, based on related corresponding specific ID (promptly with the time/frequency resource of the transmission that is used for response signal, the specific ID that the CoMP group that the base station 100 that comprises under this terminal is participated in interior a plurality of base stations is set), set sequence number and frequency hopping pattern.Here, the frequency hopping pattern that uses under the situation that response signal is received by CoMP is that CoMP receives public frequency hopping pattern in a plurality of base stations of response signal, promptly participates in public frequency hopping pattern in a plurality of base stations of same CoMP group.On the other hand, control unit 209 is under the situation that the response signal that sends from this terminal is not received by CoMP, and the sub-district ID based on 100 notices from the base station sets sequence number and frequency hopping pattern.And control unit 209 is controlled the cyclic shift amount of the ZAC sequence that is used for a spread spectrum in the spectrum-spreading unit 214 and the block unit spread spectrum code sequence that is used for the secondary spread spectrum of spectrum-spreading unit 217 according to sequence number and the frequency hopping pattern set.The details of the sequence control in the control unit 209 will be narrated in the back.And control unit 209 will output to IFFT unit 220 as the ZAC sequence of reference signal.

Spectrum-spreading unit 214 is modulated and outputed to the response signal of 213 pairs of 212 inputs from the CRC unit of modulating unit.

Spectrum-spreading unit 214 uses the ZAC sequence of having been set by control unit 209, and response signal is carried out spread spectrum one time, and the response signal behind spread spectrum is outputed to IFFT unit 215.That is to say that spectrum-spreading unit 214 carries out spread spectrum according to sequence and frequency hopping pattern by control unit 209 indications one time to response signal.Here, the cyclic shift amount that is used for the cyclic shift frequency hopping is unit and difference with SC-FDMA, so spectrum-spreading unit 214 uses the cyclic shift amount different to each SC-FDMA code element, and response signal is carried out spread spectrum one time.

Response signal behind the 215 pairs of spread spectrums in IFFT unit is carried out IFFT, and the response signal behind the IFFT is outputed to CP extra cell 216.

CP extra cell 216 will divide identical signal to append to the beginning of this response signal as CP with the tail portion of response signal behind the IFFT.

Spectrum-spreading unit 217 uses the block unit spread spectrum code sequence of having been set by control unit 209, the response signal behind the additional CP is carried out the secondary spread spectrum, and the response signal behind the secondary spread spectrum is outputed to Multiplexing Unit 218.That is to say that spectrum-spreading unit 217 uses the corresponding block unit spread spectrum code sequence of having selected with control unit 209 of resource, the response signal behind spread spectrum is carried out the secondary spread spectrum.

The 220 pairs of reference signals in IFFT unit are carried out IFFT, and the reference signal behind the IFFT is outputed to CP extra cell 221.

CP extra cell 221 will divide identical signal to append to the beginning of this response signal as CP with the tail portion of reference signal behind the IFFT.

Spectrum-spreading unit 222 uses the reference signal behind the additional CP of predefined orthogonal sequence spread spectrum, and the reference signal behind the spread spectrum is outputed to Multiplexing Unit 218.

Response signal and reference signal spread spectrum after of Multiplexing Unit 218 after with the secondary spread spectrum is time-multiplexed on a time slot, and outputs to wireless transmission unit 219.

Response signal behind the 219 pairs of secondary spread spectrums in wireless transmission unit or the reference signal behind the spread spectrum are carried out D/A conversion, amplification and up-conversion etc. and are sent processing, and send to base station 100 (Fig. 9) from antenna 201.

Then, the details that sequence control in the control unit 209 and frequency hopping pattern are controlled is described.

In the following description, the eNB1～eNB5 shown in Figure 11 A comprises the structure of base station shown in Figure 9 100 respectively, and UE1～UE3 comprises the structure of terminal shown in Figure 10 200 respectively.In addition, each UE receives downlink data from the eNB separately, and sends the response signal to this downlink data.In addition, shown in Figure 11 A, in eNB1～eNB5, eNB1～eNB3 participates in CoMP group A, and eNB1, eNB4 and eNB5 participate in CoMP group B.In addition, shown in Figure 11 A, UE1 belongs to eNB1, and UE2 belongs to eNB3, and UE3 belongs to eNB4.

In addition, shown in Figure 11 B, response signal sends the uplink resource (a plurality of PUCCH for example shown in Figure 1) of usefulness and represents with a plurality of PRB (response signal PRB).Shown in Figure 11 B, among a part of PRB in a plurality of PRB, each CoMP group is set PRB respectively.In addition, the specific ID of each CoMP group is with related corresponding corresponding to the PRB of each CoMP group.

That is to say that the eNB1～eNB3 that participates in the CoMP group A shown in Figure 11 A keeps the specific ID of CoMP group A, participate in eNB1, the eNB4 of CoMP group B and the specific ID that eNB5 keeps CoMP group B.In addition, the specific ID of the notified CoMP group of the UE2 A in the CoMP group A and the response signal PRB of the group of the CoMP shown in Figure 11 B A.In addition, the specific ID of the notified CoMP group of the UE3 B in the CoMP group B and the response signal PRB of the group of the CoMP shown in Figure 11 B B.In addition, eNB1 participates in both of CoMP group A and CoMP group B, keeps both specific ID of CoMP group A and CoMP group B.But a UE can not participate in a plurality of CoMP groups, thereby eNB1 is to the specific ID of any the CoMP group among UE1 notice CoMP group A and the CoMP group B.Here, the UE1 that belongs to eNB1 participates in CoMP group A.Thus, the response signal PRB of the specific ID of the notified CoMP group of UE1 A and the group of the CoMP shown in Figure 11 B A.

Thus, under the situation that the response signal that notified this terminal sends is not received by CoMP, the control unit 209 of each UE uses the sub-district ID of the eNB under these terminals, the frequency expansion sequence of calculated response signal and frequency hopping pattern.Particularly, in Figure 11 A, UE1 calculates frequency expansion sequence and the frequency hopping pattern corresponding with the sub-district ID of eNB1, and UE2 calculates frequency expansion sequence and the frequency hopping pattern corresponding with the sub-district ID of eNB3, and UE3 calculates frequency expansion sequence and the frequency hopping pattern corresponding with the sub-district ID of eNB4.

On the other hand, under the situation that the response signal that notified this terminal sends is received by CoMP, the control unit 209 of each UE uses the specific ID of the CoMP group that the eNB under these terminals participates in, the frequency expansion sequence of calculated response signal and frequency hopping pattern.Particularly, in Figure 11 A, UE1 calculates corresponding frequency expansion sequence and the frequency hopping pattern of specific ID with CoMP group A, and UE2 calculates corresponding frequency expansion sequence and the frequency hopping pattern of specific ID with CoMP group A, and UE3 calculates corresponding frequency expansion sequence and the frequency hopping pattern of specific ID with CoMP group B.

And the response signal that each UE will use the frequency expansion sequence controlled by control unit 209 and frequency hopping pattern to carry out the spread spectrum gained is distributed to related corresponding PRB with specific ID and is sent.

Like this, the UE (UE1 shown in Figure 11 and UE2) that is positioned at same CoMP group uses and corresponding frequency expansion sequence and the frequency hopping pattern of same specific ID (specific ID of CoMP group A), and response signal is carried out spread spectrum.Thus, the UE1 and the UE2 that be positioned at same CoMP group, belong to mutually different eNB also use same frequency expansion sequence and frequency hopping pattern, and response signal is carried out spread spectrum.And the response signal sign indicating number that response signal that UE1 is sent and UE2 send is multiplexing in the PRB that the group of the CoMP shown in Figure 11 B A uses.Thus, in a plurality of eNB that participate in same CoMP group, participate in same CoMP group, to belong to response signal that the UE of mutually different eNB sends respectively mutually orthogonal and received by CoMP.

Thus, even under the mutually different situation in base station (that is, each terminal belongs under the situation of sub-district of mutually different base station) as the service NB of each terminal, also can be in same PRB that response signal is carried out sign indicating number is multiplexing.And the base station of participating in same CoMP group can receive carry out CoMP from the mutually orthogonal response signal of each terminal respectively.Thus, in each base station, each response signal is decoded without interfering with each other mutually.

Like this, according to present embodiment, public frequency hopping pattern carries out spread spectrum in a plurality of base stations of the same CoMP group of response signal use participation that a plurality of base station CoMP receive.Thus, each terminal can make the response signal of carrying out the CoMP reception by same CoMP group mutually orthogonal, and sign indicating number is multiplexing in time/frequency resource (PRB) of using as the uplink control channel.Thus, mutually orthogonal from the response signal that each terminal sends, do not produce interference mutually, so the CoMP reception efficiently of each base station is from the response signal of each terminal.Thus, according to present embodiment, can not increase the expense of uplink control channel and carry out CoMP communication efficiently.

Here, for example, in order in uplink control channel (for example PUCCH), to carry out CoMP communication, if the base station will be used for the frequency expansion sequence of spread spectrum response signal and frequency hopping pattern (promptly, with corresponding frequency expansion sequence and the frequency hopping pattern of CoMP group) be notified to each terminal respectively, then the signaling amount of announcement information increases.But, according to present embodiment, each CoMP group is set specific ID, the announcement information that is used for CoMP communication that therefore is notified to terminal from the base station only has the specific ID with sub-district ID same number of bits to get final product.Thus, according to present embodiment, can suppress to mail to the increase of signaling amount of the announcement information of terminal from the base station.

In addition, generally speaking, sub-district ID is not only corresponding related with the setting of frequency expansion sequence that is used for response signal and frequency hopping pattern, and is also corresponding related with the setting of the mapping (interlaced pattern) of for example PDCCH or the sequence of DL RS (Downlink Reference Signal, downlink reference signal) etc.That is to say that sub-district ID is corresponding related with the parameter of uplink and downgoing line, therefore if change sub-district ID, then the parameter generating to uplink and downgoing line influences, and the change part in the high level increases.Relative therewith, in the present embodiment, in a plurality of base stations the response signal of coming self terminal is carried out under the situation of CoMP reception, only use the corresponding related specific ID of parameter (frequency expansion sequence of response signal and frequency hopping pattern) with uplink, just use and identifier that the parameter of downgoing line has nothing to do.Therefore, according to present embodiment, the base station can be not to the parameter generating influence of downgoing line and response signal is carried out CoMP receive.

In addition, each terminal is based on the sub-district ID that notifies from the base station or specific ID is controlled frequency expansion sequence and frequency hopping pattern gets final product, and need not consider this terminal sends response signal for which base station.Thus, according to present embodiment, in terminal,, therefore can simplify terminal as long as obtain just can carry out suitable control from the information of base station notice.

In addition, in the present embodiment, under the situation of carrying out CoMP communication, have only the specific ID of use this point different with the action of 3GPP LTE.That is to say that terminal can be utilized the major part of the action of 3GPP LTE once more.Thus,, in 3GPP LTE, the change part in the high level Min. can be suppressed to, and the increase of signaling amount of the control information of terminal can be suppressed to mail to according to present embodiment.

In addition, in the present embodiment, illustrated that each terminal receives downlink data from a base station, and sent situation the response signal of this downlink data.But in the present invention, each terminal also can receive downlink data simultaneously from a plurality of base stations.In other words, a plurality of base stations also can send downlink data to a terminal CoMP.Thus, in terminal, can improve the quality of reception of downlink data.

(execution mode 2)

In execution mode 1, illustrated that a plurality of base stations carry out the situation that CoMP receives to response signal.Relative therewith, in the present embodiment, be described as follows situation, that is: a plurality of base stations of participating in same CoMP group send downlink data (reference signal) for terminal CoMP, and the CQI signal that expression uses this downlink data (reference signal) to measure the downgoing line quality of gained is carried out CoMP receive.

Below, be specifically described.In the following description, the CoMP transmission is carried out to reference signal and downlink data in a plurality of base stations of participating in same CoMP group.That is to say, in terminal, receive carried out sign indicating number multiplexing, from the reference signal of a plurality of base stations.In addition, the information of resource (for example PRB) that expression is used for the transmission of CQI signal is prenoticed for terminal in the base station.

The structure of the base station 300 of present embodiment shown in Figure 12, the structure of the terminal 400 of present embodiment shown in Figure 13.In addition, in Figure 12, add identical label, and omit explanation for the structure member identical with Fig. 9 (execution mode 1).Equally, in Figure 13, add identical label, and omit explanation for the structure member identical with Figure 10 (execution mode 1).In addition, as mentioned above, for the CQI signal, do not carry out secondary spread spectrum based on orthogonal coding sequence (walsh sequence or Fourier series etc.), therefore in base station shown in Figure 12 300, do not need despread unit shown in Figure 9 114, in terminal shown in Figure 13 400, do not need spectrum-spreading unit shown in Figure 10 217.

In base station shown in Figure 12 300, participation is input to identifying unit 118 by the backhaul transmission from CoMP control unit 117 with the analog information of the CQI signal that other base stations that the same CoMP of our station organizes receive.In addition, the CQI signal that receives of our station is input to identifying unit 118 from relevant treatment unit 116.Identifying unit 118 will be from the relevant treatment unit 116 inputs the CQI signals and synthesize from the CQI signal of CoMP control unit 117 inputs, and demodulation is as CQI signal that should synthetic result.

MCS control unit 301 is controlled MCS (encoding rate and modulation system) based on the CQI information of a plurality of base stations that comprise from the CQI signal of identifying unit 118 inputs.And MCS control unit 301 outputs to coding unit 105 with the encoding rate that is controlled, and the modulation system that is controlled is outputed to modulating unit 107.

Coding unit 105 sends data according to the encoding rate modulation of importing from MCS control unit 301, and modulating unit 107 is modulated the transmission data after encoding according to the modulation system from 301 inputs of MCS control unit.

On the other hand, in terminal shown in Figure 13 400, extraction unit 205 extracts the reference signal (to carry out the signal of the multiplexing gained of sign indicating number from the reference signal of each base station) that sends from a plurality of base station CoMP that participate in same CoMP group, and outputs to measuring unit 401.

Measuring unit 401 uses from the reference signal of extraction unit 205 inputs, measures the downgoing line quality between this terminal and each base station respectively.Here, be difficult to make the CQI information of the downgoing line quality of representing each base station in a plurality of base stations to arrive all base stations of participating in the CoMP group respectively.So, the CQI information of the downgoing line quality of each base station in a plurality of base stations that measuring unit 401 pairs of expressions have been measured, for example compressing and gather is a CQI signal.And the CQI signal that measuring unit 401 will comprise the CQI information of a plurality of base stations outputs to modulating unit 213.

The details of control unit 209 of the terminal 400 of present embodiment then, is described.

In the following description, shown in Figure 14 A, use eNB and the UE identical to describe with the eNB1～eNB5 shown in Figure 11 A and UE1～UE3.In addition, the eNB1～eNB5 shown in Figure 14 A comprises the structure of base station shown in Figure 12 300 respectively, and UE1～UE3 comprises the structure of terminal shown in Figure 13 400 respectively.In addition, each UE receives reference signals from a plurality of eNB that participation comprises the CoMP group of the eNB under this terminal, and will use this reference signal to measure the CQI signal transmission of gained.That is to say, in Figure 14 A, UE1 receives the reference signal from the eNB1～eNB3 that participates in CoMP group A, and UE2 receives the reference signal from the eNB1～eNB3 that participates in CoMP group A, and UE3 receives from the eNB1, the eNB4 that participate in CoMP group B and the reference signal of eNB5.In other words, the eNB1～eNB3 that participates in CoMP group A is for UE1 and UE2, and CoMP sends reference signal, and eNB1, the eNB4 of participation CoMP group B and eNB5 are for UE3, and CoMP sends reference signal.

In addition, as shown in Figure 14B, the CQI signal sends the uplink resource (a plurality of PUCCH for example shown in Figure 1) of usefulness and represents with a plurality of PRB (CQI signal PRB).As shown in Figure 14B, same with execution mode 1, among a part of PRB in a plurality of PRB, each CoMP group is set PRB respectively.In addition, the specific ID of each CoMP group is with related corresponding corresponding to the PRB of each CoMP group.

Thus, same with execution mode 1, under the situation that the CQI signal that the control unit 209 of each UE sends in notified this terminal is not received by CoMP, use the sub-district ID of the eNB under this terminal, calculate the frequency expansion sequence and the frequency hopping pattern of CQI signal.

In addition, same with execution mode 1, under the situation that the CQI signal that the control unit 209 of each UE sends in notified this terminal is received by CoMP, use the specific ID of the CoMP group that the eNB under this terminal participates in, calculate the frequency expansion sequence and the frequency hopping pattern of CQI signal.

Thus, same with execution mode 1, in a plurality of eNB that participate in same CoMP group, participate in same CoMP group, to belong to CQI signal that the UE of mutually different eNB sends respectively mutually orthogonal and received by CoMP.

That is to say, even belong in each terminal under the situation of sub-district of mutually different base station, also can be in same PRB that the CQI signal is carried out sign indicating number is multiplexing.That is to say, participate in the base station of same CoMP group and can carry out the CoMP reception to mutually orthogonal CQI signal respectively from each terminal.

Like this, according to present embodiment, public frequency hopping pattern carries out spread spectrum in a plurality of base stations of the same CoMP group of CQI signal use participation that a plurality of base station CoMP receive.That is to say that each terminal can make the CQI signal that carries out the CoMP reception by same CoMP group mutually orthogonal, and sign indicating number is multiplexing in time/frequency resource (PRB) of using as the uplink control channel.Thus, mutually orthogonal from the response signal that each terminal sends, do not produce interference mutually, so the CoMP reception efficiently of each base station is from the CQI signal of each terminal.Thus,, receive at CoMP under the situation of CQI signal, also can obtain the effect identical with execution mode 1 according to present embodiment.In view of the above, in the base station, utilize CoMP to receive the quality of reception that improves the CQI signal,, can improve the throughput that the CoMP in the downgoing line sends therefore by the higher CQI information of service precision.

(execution mode 3)

In execution mode 1 and execution mode 2, suppose between a plurality of base stations of participating in same CoMP group, can obtain the situation of slot synchronization, the situation of the timeslot number unanimity in all base stations of participating in same CoMP group has been described.Relative therewith, in the present embodiment, the situation of failing to obtain slot synchronization between a plurality of base stations of participating in same CoMP group is described, promptly participate in the inconsistent situation of timeslot number in all base stations of same CoMP group.

Here, define the frequency hopping pattern of control signal (response signal or CQI signal) by the resource distribution of control channel (PUCCH) that the control signal on each time slot cyclic shift cyclic shift axle is used.So the base station of present embodiment and terminal are used the difference of the timeslot number between a plurality of base stations, the resource distribution of a plurality of control channels on the expression cyclic shift axle and the frequency hopping pattern of the correspondence between the timeslot number are adjusted.

Below, be specifically described.Same with execution mode 1 and execution mode 2, the base station of present embodiment is for the time/frequency resource (for example PRB) of the transmission usefulness of the sub-district ID of terminal notice our station, control signal (response signal or CQI signal) and the corresponding specific ID of CoMP group of participating in our station.And, in addition, the base station of present embodiment notice comprises the difference between the timeslot number of the timeslot number of the certain base station (for example service eNB of certain terminal) of our station in a plurality of base stations of interior participation CoMP group and our station, as interim timeslot number (hereinafter referred to as particular time-slot number).That is to say that a plurality of base stations of participating in the CoMP group are benchmark with the timeslot number in the certain base station, calculate difference between the timeslot number in benchmark timeslot number and each base station as particular time-slot number.And each base station is to the terminal notice particular time-slot that belongs to our station number.

And, the terminal of present embodiment (for example Figure 10 and control unit 209 shown in Figure 13), under the situation that the control signal (response signal or CQI signal) that this terminal sends is received by CoMP, the specific ID of the CoMP group that use has been notified, the timeslot number of the base station under this terminal and particular time-slot number calculate frequency expansion sequence and frequency hopping pattern.Particularly, same with execution mode 1 and execution mode 2, terminal is used the frequency expansion sequence and the frequency hopping pattern of specific ID calculation control signal.Here, terminal uses the timeslot number of the base station under this terminal to be shifted notified particular time-slot number (promptly, as the difference between the timeslot number of the timeslot number of the base station of benchmark and the base station under this terminal) after the frequency hopping pattern of timeslot number so that with identical as the resource distribution of the timeslot number in the base station of benchmark.Thus, the frequency hopping pattern of terminal adjustment calculating.

Thus, in all sub-districts of participating in the CoMP group, can use and carry out CoMP as the identical frequency hopping pattern of the frequency hopping pattern of the timeslot number of the base station of benchmark and communicate by letter.

Thus, according to present embodiment,, also can obtain the effect same with execution mode 1 and execution mode 2 even between a plurality of base stations of participating in same CoMP group, fail to obtain under the situation of slot synchronization.

More than, embodiments of the present invention have been described.

In addition, in the above-described embodiment, the situation that response signal (ACK/NACK) or CQI signal are received by CoMP has been described in uplink.But in the present invention, the signal that is received by CoMP is not limited to CQI signal and response signal.For example,, perhaps be used for having produced the SR (Scheduling Request, dispatch request) that sends data in end side, also can be suitable for the present invention to the base station notice for the RI (Rank Indicator, order designator) of expression down channel rank of matrix number.

In addition, in the above-described embodiment, the situation of setting specific ID as related corresponding independent parameter with CoMP usefulness PRB has been described.But, in the present invention, as with CoMP with PRB related corresponding independent parameter, except specific ID, also for example can set independently power contorl parameters.That is to say that the base station can be to terminal notice and CoMP related corresponding specific ID of PRB and power contorl parameters.

In addition, the PUCCH that uses in the explanation of above-mentioned execution mode is the channel that is used for feedback response signal (ACK or NACK), therefore is also referred to as the ACK/NACK channel sometimes.

In addition, terminal is also referred to as terminal station, UE, MT, MS, STA (Station stands) sometimes.In addition, the base station is also referred to as Node B, BS, AP sometimes.In addition, subcarrier is also referred to as tone (tone) sometimes.In addition, CP is also referred to as protection (Guard Interval at interval sometimes; GI).

In addition, the method for error detection occurs is not limited to CRC.

In addition, the method for carrying out the conversion between frequency domain and the time domain is not limited to IFFT, FFT.

In addition, though be that example is illustrated to be made of situation of the present invention hardware in the above-described embodiment, the present invention also can be realized by software.

In addition, employed each functional block typically realizes by the LSI (large scale integrated circuit) of integrated circuit in the explanation of above-mentioned execution mode.These pieces both can be integrated into a chip individually, were integrated into a chip with also can comprising part or all.In addition, though be called LSI,, be also referred to as IC (integrated circuit), system LSI, super LSI (Super LSI) or very big LSI (Ultra LSI) etc. sometimes according to the difference of degree of integration at this.

In addition, realize that the method for integrated circuit is not limited only to LSI, also can use special circuit or general processor to realize.Also can utilize can LSI make the back programming FPGA (Field Programmable Gate Array: field programmable gate array), the perhaps reconfigurable processor of the connection of the circuit unit of restructural LSI inside or setting (Reconfigurable Processor).

Have again,, can certainly utilize this technology to carry out the integrated of functional block if, the technology of the integrated circuit of LSI occurred to replace along with the progress of semiconductor technology or with the appearance of the other technologies of its derivation.Also exist the possibility that is suitable for biotechnology etc.

The disclosure of specification, Figure of description and specification digest that the Japanese patent application of submitting on December 10th, 2008 is comprised for 2008-314791 number is fully incorporated in the application.

Industrial applicibility

The present invention can be applicable to mobile communication system etc.

Claims (8)

1. radio communication terminal device comprises:

First spectrum-spreading unit, any sequence in a plurality of first sequences that use can be separated from each other is carried out spread spectrum one time to signal; And

Control unit, according to frequency hopping pattern by a plurality of channels of described a plurality of first sequence definitions, first sequence that control is used by described first spectrum-spreading unit,

Described frequency hopping pattern is coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

2. radio communication terminal device as claimed in claim 1,

Described frequency hopping pattern is to participate in public frequency hopping pattern in described a plurality of radio communication base station devices of same coordination multiple spot group.

3. radio communication terminal device as claimed in claim 1,

Described control unit uses and comprising the corresponding described frequency hopping pattern of identifier that the affiliated radio communication base station device of this device has been set in the coordination multiple spot group of interior described a plurality of radio communication base station devices participation.

4. radio communication terminal device as claimed in claim 1 also comprises:

Second spectrum-spreading unit uses any sequence in mutually orthogonal a plurality of second sequences, and the described signal behind spread spectrum is carried out the secondary spread spectrum,

Described control unit basis is by the described frequency hopping pattern of described a plurality of control channels of described a plurality of first sequences and described a plurality of second sequence definitions, and control is by first sequence of described first spectrum-spreading unit use and second sequence of being used by described second spectrum-spreading unit.

5. radio communication terminal device as claimed in claim 1,

Described control unit uses the difference of the timeslot number between described a plurality of radio communication base station device, and the resource distribution of the described a plurality of channels on the expression cyclic shift axle is adjusted with the corresponding described frequency hopping pattern between the described timeslot number.

6. radio communication terminal device as claimed in claim 5,

Described control unit uses the described difference between the timeslot number of the timeslot number of the radio communication base station device under this device and specific wireless communication base station device between described a plurality of radio communication base station devices, adjust described frequency hopping pattern.

7. radio communication base station device comprises:

The relevant treatment unit, use is by the frequency hopping pattern of a plurality of channels of a plurality of first sequence definitions that can be separated from each other, and asks from the correlation between described first sequence that has been used for a spread spectrum in the signal of radio communication terminal device and the described radio communication terminal device; And

Synthesis unit, the correlation of the described signal that receives with described correlation with by other radio communication base station devices that described signal is coordinated to receive synthesizes,

Described frequency hopping pattern is coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

8. signal spread-spectrum method comprises:

The first spread spectrum step, any sequence in a plurality of first sequences that use can be separated from each other is carried out spread spectrum one time to signal; And

Controlled step, according to frequency hopping pattern by a plurality of channels of described a plurality of first sequence definitions, first sequence that control is used by described first spectrum-spreading unit,

Described frequency hopping pattern is coordinate to receive public frequency hopping pattern in a plurality of radio communication base station devices of described signal.

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